VoIP telecommunications switch
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United States of America Patent
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Feb 28, 2012
Grant Date -
Feb 21, 2008
app pub date -
Aug 17, 2007
filing date -
Aug 17, 2006
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Abstract
An exploitation of the proper classification of conventional call processing states into categories, each category corresponding to one of the call states of the SIP finite-state machine (FSM), yields simplified design, implementation, and operation of heterogeneous call processing. A separate FSM for the SIP-categorized call states running in parallel with a conventional port event processing (PEP) FSM, implements a VoIP Local Call Controller by passing events between the SIP-type FSM and the PEP FSM only at the points where a transition between SIP categories occurs.
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